There was an Armeria Beristain y Cia of Barcelona, Spain in the early 1900s and seems to have slipped into obscurity some time in the early 1930s. They were assoicated/peddled Bufalo pistols by Gabilondo y Urresti also in the early 1900s. Other pistol models were Ruby and Danton but I haven't found any info on scatterguns.

Kind Regards,

Raimey
rse